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Dual specificity phosphatases (DUSPs) constitute a heterogeneous group of protein tyrosine phosphatases with the ability to dephosphorylate Ser/Thr and Tyr residues from proteins, as well as from other non-proteinaceous substrates including signaling lipids. DUSPs include, among others, MAP kinase (MAPK) phosphatases (MKPs) and small-size atypical DUSPs. MKPs are enzymes specialized in regulating the activity and subcellular location of MAPKs, whereas the function of small-size atypical DUSPs seems to be more diverse. DUSPs have emerged as key players in the regulation of cell growth, differentiation, stress response, and apoptosis. DUSPs regulate essential physiological processes, including immunity, neurobiology and metabolic homeostasis, and have been implicated in tumorigenesis, pathological inflammation and metabolic disorders. Accordingly, alterations in the expression or function of MKPs and small-size atypical DUSPs have consequences essential to human disease, making these enzymes potential biological markers and therapeutic targets. This Special Issue covers recent advances in the molecular mechanisms and biological functions of MKPs and small-size atypical DUSPs, and their relevance in human disease.

hematopoietic cells --- DEPArray --- n/a --- neuroblastoma --- liver steatosis --- MAPK phosphatase --- DUSP-4 --- granule neurons --- neuronal differentiation --- DUSP10 --- cytokines --- MAPKs --- single cell analysis --- macrophage --- asthma --- E. coli infection --- MAPK --- Cpp1 --- nucleotide receptors --- atypical DUSP --- RSV --- Pmp1 --- cannabinoids --- astrocytes --- sepsis --- influenza --- signaling --- triple-negative breast cancer (TNBC) --- differentiation --- HDAC6 (histone deacetylase isoform 6) --- atypical dual-specificity phosphatases --- microtubules --- respiratory viruses --- MK-STYX (MAPK (mitogen-activated protein kinase) phosphoserine/threonine/tyrosine-binding protein) --- dual-specificity phosphatase --- Msg5 --- TLR signaling --- mitogen-activated protein kinase --- fungal MKPs --- macrophages --- MAP Kinase Phosphatase-2 --- inflammation --- Sdp1 --- circulating tumor cells (CTCs) --- MAP kinases --- MAP kinase phosphatases --- P2X7 --- proliferation --- BDNF --- P2Y13 --- T cell --- hypertriglyceridemia --- integrated omics analysis --- post-translational modification --- rhinovirus --- protein stability --- ubiquitination --- dual-specificity phosphatases --- Mkp-1 --- cancer --- brain metastasis --- HER2 --- COPD --- pseudophosphatase

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The combination of an increasing prevalence of diabetes and the aging of populations enables the appearance of a greater number of associated complications such as diabetic retinopathy. Diabetic retinopathy is the leading cause of preventable vision loss in working-age adults. The objective of this Special Issue is to highlight the existing evidence regarding the relationship between oxidative stress and low-grade chronic inflammation induced by hyperglycemia with the development and progression of diabetic retinopathy, with an emphasis on the importance of early diagnosis and the use of antioxidant and anti-inflammatory approaches to prevent or delay the harmful effects of diabetes on retinal tissue.

eicosanoids --- oxidative stress --- diabetic retinopathy --- cyclooxygenase --- lipoxygenase --- Cytochrome P450 --- HDAC6 --- tubastatin A --- retinal endothelial cells --- retinal endothelial cell senescence --- db/db mice --- Cinnamomi Ramulus --- Paeoniae Radix --- CPA4-1 --- blood-retinal barrier --- occludin --- human retina --- epiretinal membrane --- internal limiting membrane --- vitreoretinal surgery --- macular hole --- proliferative diabetic retinopathy --- antioxidants --- diabetes mellitus --- free radicals --- high-mobility group box 1 (HMGB1) --- inflammatory pathways --- novel therapies --- diabetic retinopathy (DR) --- inflammation --- angiogenesis --- extracellular vesicles --- miRNA --- biomarkers --- apoptosis --- fenofibrate --- thioredoxin --- hyperglycemia --- astaxanthin --- carotenoid --- reactive oxygen species --- photoreceptor cells --- PI3K --- Nrf2 --- eicosapentaenoic acid (EPA) --- docosahexaenoic acid (DHA) --- retinal pigment epithelium --- antioxidant --- ascorbic acid --- retinal disease --- vitamin D --- GLP-1 --- superoxide dismutase --- biomarkers of diabetic retinopathy --- metabolic memory --- tear film --- aqueous humor --- vitreous humor --- mitochondria --- redox --- photoreceptor --- glycation --- aging --- glyoxalase --- n/a